Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 333, Taiwan.
Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 333, Taiwan; Department of General Dentistry, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
Carbohydr Polym. 2021 Apr 1;257:117633. doi: 10.1016/j.carbpol.2021.117633. Epub 2021 Jan 12.
Shape memory polymer (SMP), composites and blends need to be prepared to improve the properties or obtain new functions of SMPs. In this work, we successfully prepared p-coumaric acid-modified water-soluble chitosan (M-Cs) and poly (vinyl alcohol) blended membrane (PVA/M-Cs) by a simple solution casting method to enhance its physico-chemical properties, including water-induced shape memory behavior. M-Cs were synthesized from native chitosan (Cs) using carbodiimide chemistry. After the addition of M-Cs into the PVA polymer matrix, it exhibited better water-induced shape memory behavior and shape recovery ratio reach nearly 100 %. Moreover, the water contact angle value declined after the addition of Cs or M-Cs in to the PVA polymer matrix. Based on these findings, the respective blended membranes will be able to broaden the applications of SMPs in many sectors, especially in the biomedical field, which requires water as the main stimulus.
形状记忆聚合物（SMP）、复合材料和共混物需要进行制备，以改善 SMP 的性能或获得新的功能。在这项工作中，我们通过简单的溶液浇铸法成功制备了对羟基肉桂酸改性的水溶性壳聚糖（M-Cs）和聚乙烯醇共混膜（PVA/M-Cs），以增强其物理化学性能，包括水诱导的形状记忆性能。M-Cs 是通过碳二亚胺化学从天然壳聚糖（Cs）合成的。在将 M-Cs 添加到 PVA 聚合物基质中后，它表现出更好的水诱导形状记忆性能和形状恢复率接近 100%。此外，在将 Cs 或 M-Cs 添加到 PVA 聚合物基质中后，水接触角值降低。基于这些发现，相应的共混膜将能够拓宽 SMP 在许多领域的应用，特别是在需要水作为主要刺激的生物医学领域。
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